以苯并三氮唑为分散剂的高分散银粉制备工艺研究  

Preparation of highly dispersed silver powder with benzotriazole as dispersant

作　　者：卢涛 严红革[1,2] 杨华荣 邱铁诚 王云鹏 LU Tao;YAN Hongge;YANG Huarong;QIU Tiecheng;WANG Yunpeng(School of Materials Science and Engineering,Hunan University,Changsha 410082,China;Hunan Provincial Key Laboratory of Spray Deposition Technology and Application,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]湖南大学喷射沉积技术及应用湖南省重点实验室,湖南长沙410082

出　　处：《电子元件与材料》2020年第10期37-41,共5页Electronic Components And Materials

摘　　要：以硝酸银(AgNO3)为银源、抗坏血酸为还原剂、苯并三氮唑(BTA)为分散剂,通过液相还原法制备了分散性好的超细银粉。实验研究了BTA用量,反应温度和还原剂溶液pH值等对制得银粉形貌和粒径的影响,并通过红外光谱分析了分散剂BTA的作用机理。结果表明:采用BTA为分散剂可以明显提高银粉的分散性,制得高分散的球形银粉;升高反应温度会降低银粉的粒径,但温度过高会导致银粉颗粒之间的团聚;通过调节还原剂溶液的pH值,可以将银粉的平均粒径控制在0.83~2.40μm;红外光谱分析表明,BTA分子能吸附在银粒子的表面,从而产生空间位阻作用有效阻止银颗粒间的团聚。Using silver nitrate(AgNO3)as the silver source,ascorbic acid as the reductant and benzotriazole(BTA)as the dispersant,the ultrafine silver powder with good dispersibility were prepared by liquid phase reduction method.The influences of BTA dosage,reaction temperature and the pH value of the reductant on the morphology and particle size of the silver powder were studied,and the mechanism of the dispersant BTA was analyzed with infrared spectroscopy.The results show that the addition of dispersant BTA can improve the dispersibility of the silver powder,thereby highly dispersed spherical silver powder is achieved.The particle size of the silver powder can be decreased with the increase of the reaction temperature,but too high temperature will cause agglomeration between the silver particles.The average particle size of the silver powder can be controlled in the range of 0.83-2.40μm by adjusting the pH value of the reductant solution.BTA molecules can be adsorbed on the surface of silver particles to produce steric hindrance and effectively avoid the agglomeration between the silver particles.

关 键 词：超细银粉 液相还原法 分散剂 苯并三氮唑 

分 类 号：TB34[一般工业技术—材料科学与工程]